Problem 5-1A Contribution margin income statement and contribution margin ratio LO A1 The following costs result from the production and sale of 4,050 drum sets manufactured by Tight Drums Company for the year ended December 31, 2017. The drum sets sell for $255 each. The company has a 30% Income tax rate. $ 72,900 336,150 199,350 64,800 Variable production costs Plastic for casing Wages of assembly workers Drum stands Variable selling costs Sales commissions Fixed manufacturing costs Taxes on factory Factory maintenance Factory machinery depreciation Fixed selling and administrative costs Lease of equipment for sales staff Accounting staff salaries Administrative management salaries 10,500 21,000 81,000 21,000 71,090 151,000 Required: 1. Prepare a contribution margin income statement for the company 2. Compute its contribution margin per unit and its contribution margin ratio Required 1 1 Required 2 Compute its contribution margin per unit and its contribution margin ratio. (Round Contribution margin ratio to nearest whole percentage.) TIGHT DRUMS COMPANY Contribution Margin Income Statement (partial) For Year Ended December 31, 2017 . Sales Variable costs: Total variable costs Contribution margin